Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb lack

1 sense of lack

Sense 1
miss, lack -- (be without; "This soup lacks salt"; "There is something missing in my jewelry box!")

Antonyms of adj lacking

2 senses of lacking

Sense 1
deficient, lacking (predicate), wanting (predicate) -- (inadequate in amount or degree; "a deficient education"; "deficient in common sense"; "lacking in stamina"; "tested and found wanting")

INDIRECT (VIA inadequate) -> adequate, equal -- (having the requisite qualities or resources to meet a task; "she had adequate training"; "her training was adequate"; "she was adequate to the job"; "he was equal to the task")

Sense 2
lacking, absent, missing, wanting -- (nonexistent; "the thumb is absent"; "her appetite was lacking")

INDIRECT (VIA nonexistent) -> existent, existing -- (having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran")

Similarity of adj lacking

2 senses of lacking

Sense 1
deficient, lacking (predicate), wanting (predicate) -- (inadequate in amount or degree; "a deficient education"; "deficient in common sense"; "lacking in stamina"; "tested and found wanting")
       => inadequate (vs. adequate), unequal -- (lacking the requisite qualities or resources to meet a task; "inadequate training"; "the staff was inadequate"; "she was unequal to the task")

Sense 2
lacking, absent, missing, wanting -- (nonexistent; "the thumb is absent"; "her appetite was lacking")
       => nonexistent (vs. existent) -- (not having existence or being or actuality; "chimeras are nonexistent")